阅读说明：本技术 一种轿车门防撞装置 (Car door anti-collision device ) 是由 宋振钰 于 2021-05-31 设计创作，主要内容包括：本发明涉及汽车防护技术领域,且公开了一种轿车门防撞装置,通过气压仓一端靠近两侧的位置上开设有圆形通孔且该圆形通孔的内部固定套接有限流孔,限流孔流入到气压仓和行程装置之间的内腔中的气体无法维持该内腔中的压强平衡。从而使得气压仓和行程装置之间内腔中的压强降低,在该压强变化的影响下触发板朝向流通板所在的方向上移动并使得触发头与接触块相接触,从而使距离感应器激活,保证了车门处于较高速度打开并可能对两侧车辆造成撞击损伤的情况下才会激活距离感应器并使距离感应器处于工作状态下,避免了距离感应器一直处在运行的状态,造成了距离感应器的使用寿命下降和电量的浪费,提高了该装置的使用寿命且降低了该设备的耗电量。(The invention relates to the technical field of automobile protection, and discloses a car door anti-collision device.A circular through hole is formed in a position close to two sides of one end of a pressure cabin, a limiting hole is fixedly sleeved in the circular through hole, and gas flowing into an inner cavity between the pressure cabin and a stroke device through the limiting hole cannot maintain the pressure balance in the inner cavity. Thereby make the pressure in the inner chamber reduce between atmospheric pressure storehouse and the stroke device, trigger the board and move and make trigger head and contact piece contact towards the direction at circulation board place under the influence that this pressure changes, thereby make apart from the sensor activation, guaranteed that the door is in and open at a higher speed and just can activate apart from the sensor and make apart from the sensor under the sensor is in operating condition under probably causing the condition of striking damage to the both sides vehicle, avoided being in the state of operation always apart from the sensor, the life that has caused apart from the sensor descends and the waste of electric quantity, the life who has improved the device has just reduced the power consumption of this equipment.)

1. The utility model provides a car door buffer stop, includes atmospheric pressure storehouse (1), its characterized in that: limiting hole (2) is cup jointed to the inside fixed of offering circular through-hole and this circular through-hole on the position that atmospheric pressure storehouse (1) one end is close to both sides, fixed mounting has pressure guide hole (3) on the one end of atmospheric pressure storehouse (1) and is located the position of limiting hole (2) both sides, pressure guide hole (3) are linked together with the inner chamber of atmospheric pressure storehouse (1), the inside movable mounting of atmospheric pressure storehouse (1) has stroke device (4), the one end fixed mounting of stroke device (4) has door (5), fixed mounting has apart from inductor (6) on door (5) one side and the position that is located one end, the one end fixed mounting of atmospheric pressure storehouse (1) has backup pad (7) and stroke device (4) to run through backup pad (7), the one end and backup pad (7) fixed connection of pressure guide hole (3) and run through backup pad (7), equal fixed mounting has tie-beam (8) on the position that backup pad (7) one side is close to the bottom at top And one end of the connecting beam (8) is fixedly provided with a limiting device (9).

2. The car door anti-collision device according to claim 1, characterized in that: stroke device (4) are including arc stroke piece (41), the one end fixed mounting that stroke groove and this stroke groove were seted up to the one end of arc stroke piece (41) has rectangle frame (42), the both sides fixed mounting of rectangle frame (42) inner chamber has spacing (43), the inside movable mounting of rectangle frame (42) has trigger plate (44) and triggers plate (44) and cooperate with spacing (43), fixed mounting has trigger head (45) on the position that trigger plate (44) one side is close to both ends, the one end fixed mounting of rectangle frame (42) has circulation board (46), the both sides fixed mounting that circulation hole and this circulation hole were seted up to one side of circulation board (46) has contact block (47), it is corresponding with contact block (47) to trigger head (45).

3. The car door anti-collision device according to claim 2, characterized in that: the output end of the trigger plate (44) is connected with the input end of the distance sensor (6) in a signal connection mode.

4. The car door anti-collision device according to claim 1, characterized in that: stop device (9) are including spacing storehouse (91), the movable mounting that airtight groove and this airtight groove inner chamber were seted up to one side of spacing storehouse (91) has spacing stroke board (92), it runs through spacing storehouse (91) to be close to respectively fixed the one end that has cup jointed stroke pole I (93) and stroke pole II (94) and stroke pole I (93) and stroke pole II (94) on the position at both ends on spacing stroke board (92) one side, fixed mounting has return spring (95) and return spring (95) one end and the bottom fixed connection in spacing storehouse (91) one side airtight groove on the position that stroke pole I (93) and stroke pole II (94) one side are close to the surface, the one end fixed mounting of stroke pole I (93) has quiet (96), the one end fixed mounting of stroke pole II (94) has rack (97), the inside movable mounting that cooperation groove and this cooperation groove were seted up to one side of dwang rack (97) has and moves (98) and this airtight groove and this Cooperation groove is to the cooperation, the both ends of moving dwang (98) are all fixed connection piece (99) of having cup jointed, one side fixed mounting of connection piece (99) has connecting rod (910), the opposite side fixed mounting in spacing storehouse (91) has the one end of impeller (911) and connecting rod (910) and the output fixed connection of impeller (911), leading-in pipe (912) and backup pad (7) fixed connection and be linked together with pressure guide hole (3) have been seted up to spacing storehouse (91) opposite side.

5. The car door anti-collision device according to claim 4, characterized in that: the outer surface of the static rotating rod (96) is contacted with the stroke device (4), and the pipe diameters of the static rotating rod (96) and the moving rotating rod (98) are different.

6. The car door anti-collision device according to claim 4, characterized in that: the output end of the distance sensor (6) is connected with the input end of the pusher (911) in a signal connection mode.

Technical Field

The invention relates to the technical field of automobile protection, in particular to a car door anti-collision device.

Background

Along with the increase of urban population and the improvement of people's standard of living day by day, the reserve volume of car is also bigger and bigger, make people also the huge difficult problem that faces when parkking, for it is difficult to park, the interval on present parking stall is often smaller and smaller, make after parkking get the car interval and can't make the door open completely, if door velocity of motion is too big when opening the door will lead to the door frame to strike other vehicles and cause the damage, cause economic loss to the car owner, and present door bumper mainly passes through microwave induction, various distance inductors such as infrared induction discern the distance between door frame and the barrier and control stop device and carry out spacingly to the door, thereby avoid the appearance of this kind of accident, also be the broadest door anticollision device of application range at present.

But current door anticollision equipment still has certain limitation, after the vehicle starts, the distance inductor that is located the door frame will be in the state of work always, and the vehicle is in the in-process of normally traveling and need not work apart from the inductor, this leads to this overshoot to consume the electric quantity and increase the oil consumption apart from the inductor always, also can be apart from the life decline of inductor simultaneously, in addition, because control the door through triggering stop device during the distance inductor, when making the vehicle be in emergency, if the barrier appears in car both sides this moment can lead to in-vehicle personnel to receive huge resistance at the in-process of opening the door, the problem that personnel can't in the car in the easy emergence in time flee for this, this application file provides a car door buffer stop, aim at solving above-mentioned problem that proposes.

Disclosure of Invention

Aiming at the defects of the existing car door anti-collision device in the background technology in the using process, the invention provides the car door anti-collision device which has the advantage that the distance sensor is in a working state only in the process of opening the car door, and the problem of the distance sensor in the normal running process of a vehicle is solved.

The invention provides the following technical scheme: an anti-collision device for a car door comprises an air pressure bin, wherein a round through hole is arranged at the position, close to the two sides, of one end of the air pressure bin, a limiting hole is fixedly sleeved inside the round through hole, pressure guide holes are fixedly arranged at one end of the air pressure bin and positioned at the two sides of the flow limiting hole, the pressure guide holes are communicated with the inner cavity of the air pressure bin, a stroke device is movably arranged in the air pressure bin, one end of the stroke device is fixedly provided with a vehicle door, a distance sensor is fixedly arranged at one end of one side of the vehicle door, a supporting plate is fixedly arranged at one end of the air pressure bin, and a stroke device penetrates through the supporting plate, one end of the pressure guide hole is fixedly connected with the supporting plate and penetrates through the supporting plate, a connecting beam is fixedly mounted on the position, close to the bottom of the top, of one side of the supporting plate, and a limiting device is fixedly mounted at one end of the connecting beam.

Preferably, the stroke device includes arc stroke piece, the one end fixed mounting that stroke groove and this stroke groove were seted up to the one end of arc stroke piece has the rectangle frame, the both sides fixed mounting of rectangle frame inner chamber has spacing, the inside movable mounting of rectangle frame has trigger plate and spacing to match, fixed mounting has the trigger head on the position that trigger plate one side is close to both ends, the one end fixed mounting of rectangle frame has the circulation board, the both sides fixed mounting that circulation hole and this circulation hole were seted up to one side of circulation board has the contact block, trigger head and contact block drink relatively.

Preferably, the output end of the trigger plate is connected with the input end of the distance sensor in a signal connection mode.

Preferably, the limiting device comprises a limiting bin, one side of the limiting bin is provided with an airtight groove, a limiting stroke plate is movably arranged in the inner cavity of the airtight groove, a position, close to two ends, of one side of the limiting stroke plate is respectively and fixedly sleeved with a stroke rod I and a stroke rod II, the stroke rod I and the stroke rod II penetrate through the limiting bin, a position, close to the outer surface, of one side of each of the stroke rods I and II is fixedly provided with a reset spring, one end of the reset spring is fixedly connected with the bottom of the airtight groove on one side of the limiting bin, one end of the stroke rod I is fixedly provided with a static rotating rod, one end of the stroke rod II is fixedly provided with a rack, one side of the rack is provided with a matching groove, a movable rotating rod is movably arranged in the matching groove, the movable rotating rod is matched with the matching groove, connecting pieces are fixedly sleeved at two ends of the movable rotating rod, and one side of the connecting pieces is fixedly provided with a connecting rod, the other side of the limiting bin is fixedly provided with a pusher, one end of the connecting rod is fixedly connected with the output end of the pusher, and the other side of the limiting bin is provided with a lead-in pipe which is fixedly connected with the supporting plate and communicated with the pressure guide hole.

Preferably, the outer surface of the static rotating rod is contacted with the stroke device, and the pipe diameters of the static rotating rod and the moving rotating rod are different.

Preferably, the output end of the distance sensor is connected with the input end of the pusher in a signal connection mode.

The invention has the following beneficial effects:

1. according to the invention, the stroke device is movably arranged in the air pressure bin, so that if the speed is low in the process of opening the vehicle door, the speed of separating the stroke device from the inner cavity of the air pressure bin is low, external gas can enter the inner cavity between the air pressure bin and the stroke device through the flow limiting hole, the pressure balance in the inner cavity between the air pressure bin and the stroke device is maintained, the trigger plate can be kept static, the trigger head and the contact block cannot be in contact, namely the microwave distance sensor cannot be triggered, when the vehicle door is opened quickly, the speed of separating the stroke device from the inner cavity of the air pressure bin is high, the gas flowing into the inner cavity between the air pressure bin and the stroke device through the flow limiting hole cannot maintain the pressure balance in the inner cavity, the pressure in the inner cavity between the air pressure bin and the stroke device is reduced, and the trigger plate moves towards the direction of the flow plate under the influence of the pressure change and enables the trigger head to be connected with the contact block Touch, thereby make apart from the sensor activation, thereby guaranteed that the door is in and just can activate apart from the sensor and make apart from the sensor under the condition of damage is led to the fact the striking to both sides vehicle at a higher speed and open and be in operating condition, compare in traditional equipment, avoided being in the state of operation always apart from the sensor, led to the fact the life decline of apart from the sensor and the waste of electric quantity, improved the device's life and reduced the power consumption of this equipment.

2. The invention leads the opening speed of the vehicle door to be too fast and the pressure in the inner cavity between the air pressure bin and the stroke device to be reduced through the contact of the outer surface of the static rotating rod and the stroke device and the different pipe diameters of the static rotating rod and the movable rotating rod, the effect of the pressure reduction can influence the airtight groove at one side of the limit bin through the pressure guide hole and the lead-in pipe, the limit stroke plate moves along the vertical upward direction in figure 7 under the influence, thereby increasing the acting force between the limit stroke plate and the static rotating rod and the stroke device, increasing the friction force between the limit stroke plate and the distance sensor and playing the role of reducing the speed, simultaneously, the limit stroke plate leads the movable rotating rod to be also contacted with the outer surface of the stroke device when moving, thereby leading the movable rotating rod to synchronously move along with the movement of the stroke device, because one side of the rack is provided with a matching groove and the movable rotating rod is movably arranged in the matching groove and is matched with the matching groove, make and move the dwang and can move towards quiet dwang when the pivoted and move the dwang and can contact with quiet dwang after reaching the stroke limit apart from the inductor, thereby prevent the further motion of stroke device, make and can prevent apart from the inductor to continue moving apart from the inductor after reaching the stroke limit, avoided apart from the inductor at the opening speed too fast and still be in faster speed after reaching the stroke limit apart from the inductor and lead to stop gear to receive too big effort and receive the problem of damage, the practicality of the device has been improved.

3. The invention is connected with the input end of the pusher by the signal connection mode through the output end of the distance sensor, so that the trigger head is contacted with the contact block and the circulating plate activates the distance sensor by the signal transmission mode, and when the distance sensor detects that the distance sensor is closer to an obstacle, the pusher is controlled to directly push the connecting rod and drive the movable rotating rod to move along the extending direction of the matching groove formed in the rack, so that the movable rotating rod is directly contacted with the static rotating rod to directly stop the stroke device to move.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the structure of the present invention;

FIG. 3 is a schematic right-view of the structure of the present invention;

FIG. 4 is an enlarged view of the point A in FIG. 2;

FIG. 5 is a schematic view of a structural stop device of the present invention;

FIG. 6 is a schematic top view of the structural stop device of the present invention;

FIG. 7 is an enlarged view of the point A in FIG. 6;

FIG. 8 is an enlarged view of the point B in FIG. 6 according to the present invention.

In the figure: 1. an air pressure bin; 2. a flow restriction orifice; 3. pressure guide holes; 4. a stroke device; 41. an arc-shaped stroke block; 42. a rectangular frame; 43. a limiting strip; 44. a trigger plate; 45. a trigger head; 46. a flow-through plate; 47. a contact block; 5. a vehicle door; 6. a distance sensor; 7. a support plate; 8. a connecting beam; 9. a limiting device; 91. a limiting bin; 92. a stroke limiting plate; 93. a travel rod I; 94. a stroke rod II; 95. a return spring; 96. a stationary rotating rod; 97. a rack; 98. a movable rotating rod; 99. connecting sheets; 910. a connecting rod; 911. a pusher; 912. a conduit for introducing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, a car door anti-collision device includes an air pressure chamber 1, a circular through hole is opened at a position close to two sides of one end of the air pressure chamber 1, a current limiting hole 2 is fixedly sleeved inside the circular through hole, pressure guide holes 3 are fixedly installed at positions at two sides of the current limiting hole 2 at one end of the air pressure chamber 1, the pressure guide holes 3 are communicated with an inner cavity of the air pressure chamber 1, a stroke device 4 is movably installed inside the air pressure chamber 1, so that if the speed is slow in the process of opening a car door 5, the speed of separating the stroke device 4 from the inner cavity of the air pressure chamber 1 is slow, external gas can enter the inner cavity between the air pressure chamber 1 and the stroke device 4 through the current limiting hole 2, thereby maintaining the pressure balance in the inner cavity between the air pressure chamber 1 and the stroke device 4, and enabling a trigger plate 44 to be static so that a trigger head 45 and a contact block 47 cannot be contacted, i.e. a microwave distance sensor cannot be triggered, when the vehicle door 5 is opened faster, at this time, the speed of separating the stroke device 4 from the inner cavity of the air pressure chamber 1 is faster, the air flowing into the inner cavity between the air pressure chamber 1 and the stroke device 4 through the flow limiting hole 2 cannot maintain the pressure balance in the inner cavity, so that the pressure in the inner cavity between the air pressure chamber 1 and the stroke device 4 is reduced, the trigger plate 44 moves towards the direction of the circulation plate 46 under the influence of the pressure change and the trigger head 45 is in contact with the contact block 47, so that the distance sensor 6 is activated, the distance sensor 6 is activated under the condition that the vehicle door 5 is opened at a higher speed and the vehicle on two sides is possibly impacted and damaged, compared with the conventional equipment, the condition that the distance sensor 6 is always in the running state, the service life of the distance sensor 6 is shortened, and the electric quantity is wasted is avoided, the service life of the device is prolonged, the power consumption of the device is reduced, the stroke device 4 comprises an arc stroke block 41, one end of the arc stroke block 41 is provided with a stroke groove, one end of the stroke groove is fixedly provided with a rectangular frame 42, two sides of an inner cavity of the rectangular frame 42 are fixedly provided with limit strips 43, a trigger plate 44 is movably arranged in the rectangular frame 42 and is matched with the limit strips 43, a trigger head 45 is fixedly arranged at a position, close to two ends, of one side of the trigger plate 44, a circulating plate 46 is fixedly arranged at one end of the rectangular frame 42, a circulating hole is arranged at one side of the circulating plate 46, contact blocks 47 are fixedly arranged at two sides of the circulating hole, the trigger head 45 and the contact blocks 47 are relatively drunk, one end of the stroke device 4 is fixedly provided with a vehicle door 5, a distance sensor 6 is fixedly arranged at a position, at one end, an output end of the trigger plate 44 is connected with an input end of the distance sensor 6 in a signal connection mode, one end of the air pressure bin 1 is fixedly provided with a supporting plate 7, a stroke device 4 penetrates through the supporting plate 7, one end of a pressure guide hole 3 is fixedly connected with the supporting plate 7 and penetrates through the supporting plate 7, the positions of one side of the supporting plate 7, which are close to the bottom of the top, are fixedly provided with connecting beams 8, one end of each connecting beam 8 is fixedly provided with a limiting device 9, each limiting device 9 comprises a limiting bin 91, one side of each limiting bin 91 is provided with an air tight groove, a limiting stroke plate 92 is movably arranged in the inner cavity of the air tight groove, positions, which are close to the two ends, on one side of each limiting stroke plate 92 are respectively and fixedly sleeved with a stroke rod I93 and a stroke rod II 94, the stroke rods I93 and II 94 penetrate through the limiting bins 91, a reset spring 95 is fixedly arranged on the positions, which are close to the outer surface, on one side of each stroke rod I93 and II 94, one end of the reset spring 95 is fixedly connected with, one end fixed mounting of stroke pole II 94 has rack 97, the cooperation groove has been seted up to one side of rack 97 and the inside movable mounting of this cooperation groove has moves dwang 98 and this cooperation groove to the cooperation, the surface of quiet dwang 96 contacts with stroke device 4 and the pipe diameter of quiet dwang 96 is inequality with moving dwang 98, make door 5 open the speed too fast and reduce in the inner chamber between atmospheric pressure storehouse 1 and stroke device 4 pressure, the effect of this pressure reduction can produce the influence to the airtight groove of spacing storehouse 91 one side through pressure guide hole 3 and induction tube 912, spacing stroke board 92 moves along vertical ascending direction in figure 7 under this influence, thereby make and quiet dwang 96 and stroke device 4 between the effort increase and make its between frictional force increase and play the effect of slowing down to distance inductor 6, spacing stroke board 92 also makes the dwang 98 also contact with the surface of stroke device 4 when moving thereby make 98 make Along with the synchronous motion of the stroke device 4, because one side of the rack 97 is provided with a matching groove, and the inside of the matching groove is movably provided with a movable rotating rod 98 and the movable rotating rod 98 is matched with the matching groove, the movable rotating rod 98 can move towards the fixed rotating rod 96 when rotating, after the distance sensor 6 reaches the stroke limit, the movable rotating rod 98 can be contacted with the fixed rotating rod 96, thereby preventing the stroke device 4 from further moving, and the device can prevent the distance sensor 6 from continuing to move after the distance sensor 6 reaches the stroke limit, thereby avoiding the problem that the limiting mechanism is damaged by receiving excessive acting force due to the fact that the distance sensor 6 is too fast in opening speed and the distance sensor 6 is still fast after reaching the stroke limit, improving the practicability of the device, connecting pieces 99 are fixedly sleeved at both ends of the movable rotating rod 98, a connecting rod 910 is fixedly arranged on one side of the connecting sheet 99, a pusher 911 is fixedly arranged on the other side of the limiting bin 91, one end of the connecting rod 910 is fixedly connected with the output end of the pusher 911, the output end of the distance sensor 6 is connected with the input end of the pusher 911 in a signal connection mode, the trigger head 45 is in contact with the contact block 47, the circulating plate 46 is activated in a signal transmission mode, the distance sensor 6 is controlled to directly push the connecting rod 910 and drive the movable rotating rod 98 to move along the extending direction of the matching groove formed in the rack 97 when the distance sensor 6 detects that the distance sensor is closer to an obstacle, the movable rotating rod 98 is directly in contact with the static rotating rod 96, so that the stroke device 4 is directly stopped, the stroke device 4 cannot be clamped, and the distance sensor 6 can still be opened by applying external force to the distance sensor 6, the problem that the vehicle door cannot be completely opened due to the fact that barriers exist on two sides of the vehicle door when people in the vehicle are in an emergency is solved, the safety of the device is improved, the other side of the limiting bin 91 is provided with the lead-in pipe 912, and the lead-in pipe 912 is fixedly connected with the supporting plate 7 and communicated with the pressure guide hole 3.

The using method of the invention is as follows:

in the using process, when the opening speed of the distance sensor 6 is slow, the speed of separating the stroke device 4 from the inner cavity of the air pressure bin 1 is slow, outside gas can enter the inner cavity between the air pressure bin 1 and the stroke device 4 through the flow limiting hole 2, so that the pressure balance in the inner cavity between the air pressure bin 1 and the stroke device 4 is maintained, the trigger plate 44 can be kept static, so that the trigger head 45 and the contact block 47 cannot be contacted, namely the microwave distance sensor cannot be triggered, when the opening speed of the distance sensor 6 is fast, the speed of separating the stroke device 4 from the inner cavity of the air pressure bin 1 is fast, the gas flowing into the inner cavity between the air pressure bin 1 and the stroke device 4 through the flow limiting hole 2 cannot maintain the pressure balance in the inner cavity, so that the pressure in the inner cavity between the air pressure bin 1 and the stroke device 4 is reduced, and under the influence of the pressure change, the trigger plate 44 moves towards the direction of the flow plate 46 and the trigger head 45 and the contact block are enabled to be in the direction 47 to activate the distance sensor 6, the pressure reduction effect will affect the airtight groove on one side of the position-limiting bin 91 through the pressure-guiding hole 3 and the guiding tube 912, under the effect, the position-limiting stroke plate 92 moves along the upward vertical direction in fig. 7, so that the acting force between the fixed rotating rod 96 and the stroke device 4 is increased, the friction force between the fixed rotating rod 96 and the stroke device 4 is increased, and the distance sensor 6 is decelerated, meanwhile, the position-limiting stroke plate 92 moves, and simultaneously, the movable rotating rod 98 also contacts with the outer surface of the stroke device 4, so that the movable rotating rod 98 moves synchronously with the movement of the stroke device 4, because one side of the rack 97 is provided with a matching groove, the movable rotating rod 98 is movably installed inside the matching groove, and the movable rotating rod 98 is matched with the matching groove, so that the movable rotating rod 98 can move towards the fixed rotating rod 96 when the distance sensor 6 reaches the stroke limit, the movable rotating rod 98 can contact with the fixed rotating rod 96, thereby prevent stroke device 4 further motion, make distance sensor 6 can prevent distance sensor 6 to continue to move after reaching the stroke limit, trigger head 45 and contact piece 47 contact and make circulation board 46 pass through signal transmission's mode activation distance sensor 6, and can control impeller 911 directly to promote connecting rod 910 and drive the extension direction motion of the cooperation groove that the rack 97 was seted up along movable rotating rod 98 when detecting to be close with the barrier apart from sensor 6, make movable rotating rod 98 directly contact with quiet rotating rod 96 and directly make stroke device 4 stop motion, this kind of braking mode can not be owner with stroke device 4, exert external force and still can make distance sensor 6 open to distance sensor 6.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.